For a spherical mirror of object distance u , image distance v and focal length f then correct expression for magnitude is
a) m = f - v/f
b) m = f/f -v
c) m = f - u/f
d) m = f /f -u
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Explanation:
1/f = 1/u + 1/v
M = - v/u
v/f = v/u + 1
v/u = v/f - 1
- v/u = 1 - v/f
M = (f -v)/f
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